Toshiba MMY-MUP0721HT9P-UL Service Manual page 249

Leave service valves of liquid fully open.
(if there is leakage from outdoor PMV, fully close
liquid pipe.)
[Setup of header unit]
(5) Turn on Bit3 of SW103 on the interface P.C. board of the header unit.
(Setting to prevent connected indoor units capacity over failure (E16))
(3)
Setup of failed follower outdoor unit
Uc (U5/U6) wiring treatment
Fully close gas pipe service valve.
SW101
ON
1 2 3 4
SW104
ON
1 2 3 4
- 249 -
(4)
(2)
Interface P.C. board of header unit
SW102 SW103
ON ON
1 2 3 4 1 2 3 4
SW105
SW106
ON ON
1 2 3 4 1 2
(5)
Turn on Bit 3 of SW103.